Various Types of Crawler-Mounted Cranes
In order to be able to power a huge range of equipment, industrial wheel tractors were adapted during the 1920s, by Fordson and McCormick-Deering. Like for instance, half-swing shovels and cranes were made by some companies around the tractor's power train and engine and the wheels became replaced by crawlers.
Crawler tractors came into widespread use during the 1930s. Soon after, many manufacturers started manufacturing attachments for them, including various lifting equipment devices.
For example, side-mounted booms were primarily utilized for pipe-laying where it gained its nickname the "pipelayer." These machinery are currently usually utilized for attending to cleaning up railroad derailments. Due to their size, compact design and mobility, in addition to exceptional lifting capacity, these types of machinery are ideal for this use. Moreover, swing booms which mounted on top of the engine compartment also became available.
Crawler cranes are like the crawler tractor in that it travels along crawler tracks. These machines could not move fast thanks to their intense weights. Usually, the crane could be controlled by 2 or more cable operated drums and is powered by one engine. The crawler cranes come equipped with a telescopic arm or a lattice boom that is easy to extend by utilizing hydraulics. The lattice boom should be assembled by hand by adding multiple sections.
Tower Cranes
Tower cranes are the ones found in large construction projects. These kinds of cranes are necessary to be built and broken down on location. They need to be transported by truck every time they are relocated. These tower cranes are very tall. They enable construction crews to transport concrete building parts or heavy steel to the tops of tall buildings. Tower cranes utilize a hydraulic system in order to push every new crane section up into place and therefore, are self-erecting.